Why does my dog have all those ridges in the roof of the mouth? Using high speed and x-ray videos, researchers at Harvard have determined that when dogs drink they lift water into their mouth and then use these ridges, really called rugae, to hold the water until they swallow it. For the complete article go to:
http://www.nytimes.com/2011/05/31/science/31obdog.html?_r=1&scp=1&sq=dog%20drinking&st=cse
